Ignore coverage of unreachable code

Author: remorhaz

src/Parser/SymbolType.php

@@ -24,6 +24,9 @@ final class SymbolType
 
     public const T_EOI = 0xFF;
 
+    /**
+     * @codeCoverageIgnore
+     */
     private function __construct()
     {
     }

src/Parser/TokenType.php

@@ -14,6 +14,9 @@ final class TokenType
 
     public const EOI = 0xFF;
 
+    /**
+     * @codeCoverageIgnore
+     */
     private function __construct()
     {
     }